What's your daily calorie intake to maintain your body weight? Are you worried about body fat? You can gain a lot of muscle really fast, but it might be at the expense of raising a lot more body fat. I don't know what your goals are? Power lifter physic or bodybuilder physic? You could just add 3500 calories to add a pound for the week to your body mantanice with the same 30% fat 40% Carb 30% Protein. When you think you have gained enough weight just do a cutting diet. LOT'S OF MEAT and CARBS. Remeber you can only gain so much muscle naturally. Under the BEST possible circumstances (training, diet, supplementation, recovery) the average male body can create between *0.25 and 0.50* pounds of dry muscle tissue per week or month...I can't remember. That's the natural amount that your body chemistry will allow if not using aas drugs.
I might be wrong, but this is just my 2cents. Anyone else have any advice?